<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
            </el-form-item>
                <!-- 密码 -->
            <el-form-item prop="password">
                <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima"></el-input>
            </el-form-item>  
            <el-form-item class="btns">
                <el-button type="primary" @click="login``">登录</el-button>
                <el-button type="info" @click="resetLoginForm">重置</el-button>
            </el-form-item>
        </el-form>
        </div>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                // 这是登录表单的数据绑定对象
                loginForm: {
                    username: 'admin',
                    password: '123456'
                },
                // 这是表单的验证规则对象
                loginFormRules: {
                    // 验证用户名是否合法
                    username: [
                    { required: true, message: '请输入登录名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ],
                    // 验证用户密码是否合法
                    password: [
                    { required: true, message: '请输入登录密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                    ]
                }
            }
        },
        methods: {
            // 点击重置按钮，重置登录表单
            resetLoginForm() {
                // console.log(this);
                this.$refs.loginFormRef.resetFields()
            },
            login() {
                this.$refs.loginFormRef.validate(async valid => {
                    if(!valid) return;
                    // 第一种方法自己调函数
                    // const result = await this.$http.post(arguments("login",{})
                    const { data: res } = await this.$http.post("login",this.loginForm)
                    if(res.meta.status !== 200) return this.$message.error('登陆失败！')
                    this.$message.success('登陆成功！')
                    // token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
                    window.sessionStorage.setItem("token",res.data.token)
                    // 通过编程式导航跳转到后台主页，路由地址是 /home
                    this.$router.push("/home")
                })
            }
        }
    }
</script>

<style lang="less" scoped>
    .login_container {
        background-color: #2b4b6b;
        height: 100%;
    }

    .login_box {
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius: 3px;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%,-50%);


    .avatar_box {
        height: 130px;
        width: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
}

.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.btns {
    display: flex;
    justify-content: flex-end;
}
</style>